From 846225d5750b134f5d7f75602d3076a91743edcc Mon Sep 17 00:00:00 2001 From: "adam@algroup.co.uk" Date: Mon, 6 Jul 2009 16:40:03 +0000 Subject: [PATCH] #defines for ADC channels so we can see what's what --- armsrc/appmain.c | 8 ++++---- include/at91sam7s128.h | 2 ++ 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/armsrc/appmain.c b/armsrc/appmain.c index 01e3efc9..fcb910c9 100644 --- a/armsrc/appmain.c +++ b/armsrc/appmain.c @@ -249,7 +249,7 @@ void SweepLFrange() for (i=255; i>19; i--) { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i); SpinDelay(20); - dest[i] = (137500 * AvgAdc(4)) >> 18; + dest[i] = (137500 * AvgAdc(ADC_CHAN_LF)) >> 18; } } @@ -267,7 +267,7 @@ void MeasureAntennaTuning(void) FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); SpinDelay(20); - vLf125 = AvgAdc(4); + vLf125 = AvgAdc(ADC_CHAN_LF); // Vref = 3.3V, and a 10000:240 voltage divider on the input // can measure voltages up to 137500 mV vLf125 = (137500 * vLf125) >> 10; @@ -276,7 +276,7 @@ void MeasureAntennaTuning(void) FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); SpinDelay(20); - vLf134 = AvgAdc(4); + vLf134 = AvgAdc(ADC_CHAN_LF); // Vref = 3.3V, and a 10000:240 voltage divider on the input // can measure voltages up to 137500 mV vLf134 = (137500 * vLf134) >> 10; @@ -284,7 +284,7 @@ void MeasureAntennaTuning(void) // Let the FPGA drive the high-frequency antenna around 13.56 MHz. FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); SpinDelay(20); - vHf = AvgAdc(5); + vHf = AvgAdc(ADC_CHAN_HF); // Vref = 3300mV, and an 10:1 voltage divider on the input // can measure voltages up to 33000 mV vHf = (33000 * vHf) >> 10; diff --git a/include/at91sam7s128.h b/include/at91sam7s128.h index 1a5fe1c4..7e7b3506 100644 --- a/include/at91sam7s128.h +++ b/include/at91sam7s128.h @@ -381,6 +381,8 @@ #define ADC_END_OF_RX_BUFFER (1<<18) #define ADC_RX_BUFFER_FULL (1<<19) +#define ADC_CHAN_LF 4 +#define ADC_CHAN_HF 5 //------------- // Synchronous Serial Controller -- 2.39.5